Telephone receiver



Sept. 21 1926. 1,600,354

E. B. NGWOSIELSKI TELEPHONE RECEIVER Filed- August 1924 2? F7 2 n 7 r a z/ 2 /5 B 5 5 I 12 I I E INZENTOR Patented Sept. 21, 1926.

I j V 1,600,354

EDWARD 3." nowosrnnsxr," or BLOOMIFTIEKLD, NEW J'E'RsEY; 1 Ass'reuoa 'ro senirnoaii ELEC RICA coll/[ranger NEWARKFNEW- JERSE v TnnEPnonnnEonrv-nn;

Application filed Angust 22, i924. se r'ia1=-No'. 733,477;.

This invention relatesto a telephone ceiver which may be adapted for f-a number of uses, suchias a head phoneror'aas aloud speaker used in radio circuits. 1

Ittis the object of my invention to provide a construction in which the. interior parts of the receiver are very much simplitied, at the same time increasing the general effectiveness of the receiver.: Q

Other objects will be apparent from a reading of the specification takenin connection with theannexed drawing, where- Figure 1 is a plan view of the receiver with the ear cap removed.

Figure 2 is a sectional view along the lines 22 of Fig. 1, while I Figure 3 is a bottom view of the interior parts of the receiver as withdrawn from the.

shell.

In the drawings, 1, is a shell threaded to receive the usual ear piece which is used for clamping a diaphragm, neither of these parts belng illustrated.

A novel feature of my construction is in the magnet pole pieces which are best illustrated in Fig. 3; these are preferably made from stamped sheet steel of the proper character or of soft Norway iron. Pole pieces 3 and 4 have projecting arms 5 and 6 respectively. The arms 5 and 6 are of substantially the same width and contour as the permanent magnet which rests in the shell 1 directly over said arms and pole pieces.

The pole pieces have upwardly turned arms 7 on which electro-magnetic windings 8 are positioned; ears 9 are also formed on each of the pole pieces 3 and 4 which extend outwardly in the same plane asthe flat surfaces of the pole pieces. These ears act as supporters for the spool heads 10. In assembling the receiver, the windings 8 are placed on the projecting end 7 of the pole pieces 3 and 4 which are then placed in the bottom of the shell. The magnet ll is then put in place and ing at Fig. 1 is placed an insulator 13 and then a second insulator 12 following which the screws 14 are passed through the shell 1, the pole pieces 3 and 4, and the insulators 12 and 13 and nuts 15 applied. [On the insulator 13 is mounted terminal clips 16 and 17 which have ears 19 that pass through the insulator 12 and are clenched over on on top of the magnet lookthe bottom: side tiered hit arm. a. i

seen that the, insulator 12 is: used. to. iprevent these bent .over. portions of the terminals 16. and 17 1 from comingincontact' with. the magnet 11.1 The ends ofthe windings 8 .are

connected totheterminal clips 16Band 17 which are also provided with'holes 20=and 21 through which cord terminals. .pass and Y which are clampedjin said holes-.iby the bent over portion 22 of the terminal clips. The cord terminals pass through the openings 23 in the shell 1, and from the position of the terminals 16 and 17 it will be seen that the cord terminals are completely enclosed within the receiver shell. As one means for taking the strain away from the cord terminals, I may use a clip 24 having an arm passing over one of the screws 14, the body portion of the clip lies along the inner surfaces of the shell 1 and has notches fitting over the cords as they come through the openings 23 in the shell.

From what has been said it will be observed that the arms 5 and 6 have pole pieces 3 and 4 engaged in the inner wall of the shell 1, and thereby act to hold the vertical end 7 in substantially parallel relationship; at the same time. the pole pieces are in large area contact with the magnet which I have found to be advantageous.

It will bereadily observed that my in-v vention is susceptible to numerous changes, in details and I therefore do not wish to be limited as by the scope of the appended claims.

Having thus described my invention, what I claim is: p

1. In a device ofthe class described including a casing, pole pieces having arms following the contour of the casing, a permanent magnet lying over said pole pieces and arms, a circular shaped insulator lying on said magnet on the side toward the edge of the casing, a second insulator on the first insulator carrying cord and winding terminals and means for fastening said insulators, magnet, and pole pieces to said casing.

2. In a device of the class described, including a casing, pole pieces within the cas ing and having free ends with windings thereon, a permanent magnet lying over said pole pieces, a circular shaped insulator positioned on said magnet on the side toward the free ends of said pole pieces, a second insulatorpositionedon said first, ins lator, said second insulator ca ryingfcord and inding terminals and'means for fastening, said insnlators, magnet, and pole pieces to saidcas- 1n In a device of the class described including a casing, a ma et, Windingshaving core projecting en' s overlapping said magnet throughout themaj or; portion of its arcuate length, said cores having free ends terminating: SiighflYibBlQW a plane taken across thetop. of the casing, and an insulator carrying combined cordv and Winding. terminsils positionedfom'the side said magnet toward saidcore, free-ends, andvmeans for preventing said terminalsfrom contacting withxthemagnet; V

4-. Ina device ofwthe class described includingl aa. eas;ing,'-fa magnet, windings having core projecting ends overlapping said mag- 11615311 inSulator carrying combined cord and Winding terminals, said casing having openings therein through whichcordterminals may be passed and aretaining clip fastened 'Within' the casing for engaging said cord strands for removing the strain from said last mentioned terminals 5. In adevice .of' the class described including a casing, a magnet, pole pieces having projecting. arms of substantially the same width as the magnet-and lying. on-the bottom EDWARD/B; owosmnsnfli 

